Where This Rock Is From (place, type of locality, etc.)

What This Rock Is

What I Like About This Rock

I have been traveling 20 years in my expedition vehicle and I have never seen such crystals

http://www.panoramio.com/user/823582

kind regards, richard

Advice

could you please tell me if these crystals are interesting?

I have some twenty kgs of them

I was THAT impressed

sorry about my bad English

Andrew Alden, About.com Geology, says:

These have every appearance of being tool headsadzes, mattock blades or crude shovelsmade of basalt. I see signs of wear on the ends and chipping along the edges. They were once lashed onto wooden handles. The flat faces are reminiscent of crystals.